/* ========================================
   Ahmed Saber Portfolio - Main Stylesheet
   Modern, Interactive, and Fast
   ======================================== */

/* Safe Area for Mobile */
.safe-area-bottom {
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

/* Hide Scrollbar */
.scrollbar-hide {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

.scrollbar-hide::-webkit-scrollbar {
  display: none;
}

/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --color-primary: #3b82f6;
  --color-primary-dark: #2563eb;
  --color-accent-cyan: #06b6d4;
  --color-accent-purple: #8b5cf6;
  --color-accent-pink: #ec4899;
  --color-accent-orange: #f97316;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, hsla(217, 91%, 60%, 0.3) 0px, transparent 50%),
    radial-gradient(at 80% 0%, hsla(262, 83%, 58%, 0.2) 0px, transparent 50%),
    radial-gradient(at 0% 50%, hsla(339, 100%, 60%, 0.15) 0px, transparent 50%),
    radial-gradient(at 80% 50%, hsla(195, 100%, 50%, 0.15) 0px, transparent 50%),
    radial-gradient(at 0% 100%, hsla(262, 83%, 58%, 0.1) 0px, transparent 50%);

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-glow: 0 0 40px rgb(59 130 246 / 0.3);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Blur */
  --blur-sm: 4px;
  --blur-md: 12px;
  --blur-lg: 24px;
}

/* ===== Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: 'Inter', 'Cairo', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Arabic font support */
[dir="rtl"] body,
html[lang="ar"] body {
  font-family: 'Cairo', 'Inter', sans-serif;
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  border-radius: 10px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  background-clip: padding-box;
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: #3b82f6 transparent;
}

/* ===== Selection ===== */
::selection {
  background: var(--color-primary);
  color: white;
}

/* ===== Glassmorphism ===== */
.glass {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-light {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.dark .glass-light {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== Gradient Text ===== */
.gradient-text {
  background: var(--gradient-primary);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient 8s ease infinite;
}

/* ===== Gradient Border ===== */
.gradient-border {
  position: relative;
  background: transparent;
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 2px;
  background: var(--gradient-primary);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ===== Animations ===== */
@keyframes float {

  0%,
  100% {
    transform: translateY(0px) rotate(0deg);
  }

  50% {
    transform: translateY(-20px) rotate(2deg);
  }
}

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
  }

  50% {
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.8);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }

  100% {
    background-position: 200% 0;
  }
}

@keyframes gradient {

  0%,
  100% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }
}

@keyframes blob {

  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }

  25% {
    transform: translate(20px, -30px) scale(1.1);
  }

  50% {
    transform: translate(-20px, 20px) scale(0.9);
  }

  75% {
    transform: translate(30px, 10px) scale(1.05);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideLeft {
  from {
    opacity: 0;
    transform: translateX(30px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideRight {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes typewriter {
  from {
    width: 0;
  }

  to {
    width: 100%;
  }
}

@keyframes blink {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0;
  }
}

/* Animation Classes */
.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-pulse-glow {
  animation: pulse-glow 2s ease-in-out infinite;
}

.animate-shimmer {
  animation: shimmer 2s infinite;
}

.animate-blob {
  animation: blob 7s infinite;
}

.animate-slideUp {
  animation: slideUp 0.6s ease-out forwards;
}

.animate-slideDown {
  animation: slideDown 0.6s ease-out forwards;
}

.animate-slideLeft {
  animation: slideLeft 0.6s ease-out forwards;
}

.animate-slideRight {
  animation: slideRight 0.6s ease-out forwards;
}

.animate-scaleIn {
  animation: scaleIn 0.4s ease-out forwards;
}

.animate-rotate {
  animation: rotate 20s linear infinite;
}

/* Animation Delays */
.animation-delay-100 {
  animation-delay: 100ms;
}

.animation-delay-200 {
  animation-delay: 200ms;
}

.animation-delay-300 {
  animation-delay: 300ms;
}

.animation-delay-500 {
  animation-delay: 500ms;
}

.animation-delay-1000 {
  animation-delay: 1000ms;
}

.animation-delay-2000 {
  animation-delay: 2000ms;
}

.animation-delay-4000 {
  animation-delay: 4000ms;
}

/* ===== Hover Effects ===== */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.hover-glow {
  transition: box-shadow var(--transition-base);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

.hover-scale {
  transition: transform var(--transition-fast);
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-tilt {
  transition: transform var(--transition-base);
  transform-style: preserve-3d;
}

/* ===== Cards ===== */
.card-3d {
  transform-style: preserve-3d;
  perspective: 1000px;
  transition: transform var(--transition-base);
}

.card-3d:hover {
  transform: rotateX(5deg) rotateY(5deg) translateZ(10px);
}

/* ===== Buttons ===== */
.btn-primary {
  background: var(--gradient-primary);
  background-size: 200% 200%;
  color: white;
  font-weight: 600;
  padding: 0.875rem 2rem;
  border-radius: 0.75rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover {
  background-position: 100% 0;
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-primary:active {
  transform: translateY(0);
}

/* ===== Section Styles ===== */
.section-padding {
  padding: 5rem 1.5rem;
}

@media (min-width: 768px) {
  .section-padding {
    padding: 7rem 2rem;
  }
}

/* ===== Background Mesh ===== */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--gradient-mesh);
  opacity: 0.5;
  pointer-events: none;
}

/* ===== Noise Overlay ===== */
.noise-overlay::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
}

/* ===== Skill Bars ===== */
.skill-bar {
  height: 8px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.skill-bar-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 4px;
  transition: width 1s ease-out;
  position: relative;
}

.skill-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

/* ===== Timeline ===== */
.timeline-line {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent-purple), var(--color-accent-pink));
}

.timeline-dot {
  width: 20px;
  height: 20px;
  background: var(--gradient-primary);
  border-radius: 50%;
  border: 4px solid white;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 10;
}

.dark .timeline-dot {
  border-color: #0f172a;
}

/* ===== Form Styles ===== */
.input-modern {
  width: 100%;
  padding: 1rem 1.25rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.75rem;
  color: inherit;
  font-size: 1rem;
  transition: all var(--transition-base);
}

.input-modern:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
  background: rgba(255, 255, 255, 0.08);
}

.input-modern::placeholder {
  color: rgba(148, 163, 184, 0.6);
}

/* ===== Loader ===== */
.loader-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(59, 130, 246, 0.2);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: rotate 1s linear infinite;
}

/* ===== Scroll Progress ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-primary);
  z-index: 9999;
  transform-origin: left;
  transition: transform 0.1s ease-out;
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .timeline-line {
    left: 20px;
  }

  .back-to-top {
    bottom: 5rem;
    right: 1rem;
    width: 44px;
    height: 44px;
  }
}

/* ===== Print Styles ===== */
@media print {
  .no-print {
    display: none !important;
  }

  body {
    background: white !important;
    color: black !important;
  }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ===== Dark Mode Transitions ===== */
.dark-mode-transition {
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ===== Focus Visible ===== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Hide Focus for Mouse Users ===== */
:focus:not(:focus-visible) {
  outline: none;
}